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Recent questions tagged ch1

Write the following sets in the set-builder form $A=\{3,6,9,12\}$

asked May 23, 2014 by sreemathi.v

1 answer

Write the following sets in roster form : F=The set of all letters in the word BETTER

asked May 23, 2014 by sreemathi.v

1 answer

Write the following sets in roster form : The set of all letters in word TRIGONOMETRY

asked May 23, 2014 by sreemathi.v

2 answers

Write the following sets in roster form : $D=\{x : x \text{ is a prime number which is divisor of 60}\}$

asked May 23, 2014 by sreemathi.v

1 answer

Write the following sets in roster form : $C=\{x : x \text{ is a two digit natural number such that the sum of its digits is 8 }\}$

asked May 23, 2014 by sreemathi.v

1 answer

Write the following sets in roster form : $B=\{x : x \text{ is a natural number less than 6 }\}$

asked May 22, 2014 by sreemathi.v

1 answer

Write the following sets in roster form : $A=\{x : x \text{ is an integer and } -3 \lt x \lt 7\}$

asked May 22, 2014 by sreemathi.v

1 answer

Let $A=\{1,2,3,4,5,6\}$. Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces : $10$ _______ $A$

asked May 22, 2014 by sreemathi.v

1 answer

Let $A=\{1,2,3,4,5,6\}$.Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces :$2$ _______ $A$

asked May 22, 2014 by sreemathi.v

1 answer

Let $A=\{1,2,3,4,5,6\}$. Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces :$4$ _______ $A$

asked May 22, 2014 by sreemathi.v

1 answer

Let $A=\{1,2,3,4,5,6\}$.Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces : $0$ _______ $A$

asked May 22, 2014 by sreemathi.v

1 answer

Let $A=\{1,2,3,4,5,6\}$.Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces : $8$ _______ $A$

asked May 22, 2014 by sreemathi.v

1 answer

Let $A=\{1,2,3,4,5,6\}$.Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces :$5$ _______ $A$

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer.(ix) A collection of most dangerous animals of the world

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer.(viii) The collection of question in this chapter

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer.(vii) The collection of all even integers

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer.(vi) A collection of novels written by the writer Munshi premchand

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer?(v) The collection of all natural numbers less than 100

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer?(iv) The collection of all boys in your class.

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer.(iii) A team of eleven best-cricket batsmen of the world.

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer.(ii) The collection of ten most talented writers of India.

asked May 22, 2014 by sreemathi.v

1 answer

Which of the following are sets?Justify your answer?(i) The collection of all the months of a year beginning with the letter J

asked May 22, 2014 by sreemathi.v

1 answer

A metal crystallises into two cubic phases , face-centered cubic (fcc) and body centered (bcc) whose unit lengths are $3.5 \;and\;3.0 A^{\large\circ}$ respectively . Calculate the ratio of densities of fcc and bcc.

asked Apr 9, 2014 by sharmaaparna1

1 answer

Cu metal crystallises in face centered cubic lattice with cell edge , a = 361.6 pm . What is the density of Cu crystal ? (Atomic mass of copper = 63.5 amu , $N_A = 6.023\times10^{23}$

asked Apr 9, 2014 by sharmaaparna1

1 answer

The density of crystalline sodium chloride is $2.165g cm^{-3}$ . What is the edge length of the unit cell.

asked Apr 9, 2014 by sharmaaparna1

1 answer

Silver crystallises in a face centered cubic unit cell . The density of Ag is $10.5 g cm^{-3}$. Calculate the edge length of the unit cell .

asked Apr 8, 2014 by sharmaaparna1

1 answer

The density of a pure substance 'A' whose atoms pack in cubic close pack arrangement is 1g m/cc . If B atoms can occupy tetrahedral voids and all the tetrahedral voids are occupied by 'B' atoms what is the density of resulting solid in gm/cc . [Atomic mass (A) = 30 gm/mol and atomic mass (B) = 50gm/mol]

asked Apr 7, 2014 by sharmaaparna1

1 answer

If $f_k(x) = \large\frac{1}{k}$$(\sin^k x + \cos^k x)$, where $x\in R$ and $k \geq 1$. The $f_4(x) - f_6(x)$ equals

asked Apr 6, 2014 by balaji.thirumalai

1 answer

If $a\in R$ and the equation $-3 (x-[x])^2 + 2(x-[x])+a^2 = 0$, (where $[x]$ denotes the greatest integer $\leq x$) has no integral solution, then all possible values lie in the interval:

asked Apr 6, 2014 by balaji.thirumalai

0 answers

Regarding the figure : 1. It shows asexual reproduction in sponge 2. Reproductive structures are gemmules. 3. The most common of asexual reproductive structures (in living world) is zoospores which are usually microscopic and non-motile.

asked Apr 4, 2014 by pady_1

1 answer

Choose the odd one out : (on the basis of oestrous and menstrual cycle)

asked Apr 4, 2014 by pady_1

1 answer

Parthenogenesis occurs in all except :

asked Apr 4, 2014 by pady_1

1 answer

Regarding asexual reproductive structures : Match the following & choose the most appropriate option:

asked Apr 4, 2014 by pady_1

1 answer

Asexual reproduction : 1. Cell division is itself a mode of reproduction in Protists and Monerans. 2. Many single-celled organisms reproduce by binary fission, where a cell divides into two halves and each rapidly grows into an adult (e.g., Amoeba, Paramecium). 3. In yeast, the division is unequal and small buds are produced that remain attached initially to the parent cell which, eventually gets separated and mature into new yeast organisms. Regarding 1, 2 and 3 :

asked Apr 4, 2014 by pady_1

1 answer

Identify A, B, C and D in order in the picture - choose the appropriate option :

asked Apr 4, 2014 by pady_1

1 answer

Four one litre flasks are separately filled with the gases hydrogen, helium , oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be

asked Apr 1, 2014 by meena.p

1 answer

Which of the following has the largest number of atoms?

asked Mar 31, 2014 by meena.p

1 answer

When a sample of human blood is diluted $200$ times its initial volume and microscopically examined in a layer $0.10\;mm$ thick , an average of $30\;RBC$ are found in $100 \times 100 $ micrometer square. The number of RBC in $1 \;mm^3$ of undiluted blood is

asked Mar 31, 2014 by meena.p

1 answer

Regarding the fig. Name the parts and the organism

asked Mar 26, 2014 by pady_1

1 answer

Regarding Linnaeus' time : 1. a Two Kingdom system of classification with Plantae and Animalia kingdoms was developed. 2. This system is still used till 3. This system did not distinguish between the eukaryotes and prokaryotes, & photosynthetic (green algae) and non-photosynthetic (fungi) organisms; yet this system distinguishes unicellular and multicellular organisms

asked Mar 20, 2014 by pady_1

1 answer

Regarding Aristotle: 1. used floral characters to classify plants 2. divided animals into two groups, those which had red blood and those that did not 3. a Two Kingdom system of classification with Plantae and Animalia kingdoms 4. earliest to attempt to classify organisms more on a scientific basis 5. classified plants into trees, shrubs and herbs

asked Mar 20, 2014 by pady_1

1 answer

The herbarium sheets carry a label providing information about (i)date of collection (ii)place of collection (iii)botanical names, family names (iv)English, local names (v)collector’s name

asked Mar 20, 2014 by pady_1

1 answer

1.As one goes higher from species to kingdom, the number of common characteristics goes on increasing. 2. Lower the taxa, more are the characteristics that the members within the taxon share. 3.Higher the category, determining the relationship to other taxa at the same level becomes easy.

asked Mar 20, 2014 by pady_1

1 answer

1. Families are characterised only on the basis of reproductive features of plant species 2. Lion, tiger, leopard is put along with cats and dogs in the family Felidae 3. Three different genera Solanum, Petunia and Datura are placed in the family Solanaceae

asked Mar 20, 2014 by pady_1

1 answer

1. The scientific names need not always ensure that each organism has only one name. 2. Description of any organism should enable the people (in any part of the world) to arrive at the same name. 3. While naming a new organism suh a name may have been used for some other closely related known organism.

asked Mar 20, 2014 by pady_1

1 answer

The time period of a charged simple pendulum in an electric field is:

asked Feb 28, 2014 by thanvigandhi_1

1 answer

An alloy of Copper , Silver and Gold is found to have Copper constituting the C.C.P lattice. If Silver atoms occupy the edge centres and Gold is present at body centre , the alloy will have the formula:

asked Feb 28, 2014 by sharmaaparna1

1 answer

The compound formed by elements X and Y crystallizes in cubic structure in which X atoms are at the corners of the cube and Y atoms are at the face centre . The formula of the compound is

asked Feb 28, 2014 by sharmaaparna1

1 answer

In a face centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centered. One of the A atom is missing from one corner in unit cell. The simplest formula of compound is

asked Feb 28, 2014 by sharmaaparna1

1 answer

The ratio of closed packed atoms to tetrahedral holes in cubic close packing is

asked Feb 28, 2014 by sharmaaparna1

1 answer

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