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Recent questions tagged 2013

Which one of the following SCP organisms lack a membrane bound nucleus?

asked Oct 3, 2013 by thanvigandhi_1

1 answer

Identify the correct pairs from the following

asked Oct 3, 2013 by thanvigandhi_1

1 answer

Study the following and identify the correct pair of characters for Physalis

asked Oct 3, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 3, 2013 by thanvigandhi_1

1 answer

Triple fusion was discovered in this plant possessing naked bulb, fleshy leaf bases and loculicidal capsule.

asked Oct 3, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 3, 2013 by thanvigandhi_1

1 answer

There are 25 flowers in an inflorescence of Allium. Each anther lobe of every stamen contains 60 pollen grains. What is the total number of pollen grains produced in its inflorescence?

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Identify the correct combination of characters found in cucurbita

asked Oct 2, 2013 by thanvigandhi_1

1 answer

The type of inflorescence in a plant showing polygamous condition and lateral styles is

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Identify the wrong statement

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Assume that blue flower of a plant is dominant character over white. When a blue flowered plant is crossed with white flowered plant, the progeny showed 50% of plants with blue flowers and 50% of plants with white flowers. The genotypes of blue and white parents respectively are

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Entry of pollen tube into the ovule through chalaza was discovered by Treub in a Xerophyte. This plant is associated with a pair of characters given below

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 2, 2013 by thanvigandhi_1

1 answer

Collocytes which provide mechanical strength in the plants are present in

asked Oct 1, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 1, 2013 by thanvigandhi_1

1 answer

Identify the correct pair of statements from the following

asked Oct 1, 2013 by thanvigandhi_1

1 answer

The cell organelle bounded by single unit membrane which was first reported by Rhodin is involved in the following reaction :

asked Oct 1, 2013 by thanvigandhi_1

1 answer

In a DNA fragment, there are 8 turns, with 40% of the bases are cytosine. What would be the total number of hydrogen bonds present in this DNA fragment?

asked Oct 1, 2013 by thanvigandhi_1

1 answer

Study the following lists

asked Oct 1, 2013 by thanvigandhi_1

1 answer

Identify Phenacetin from the following :

asked Sep 19, 2013 by meena.p

1 answer

The number of hydrogen bonds between Guanine & Cytosine; and between Adenine & Thymine in DNA is :

asked Sep 19, 2013 by meena.p

1 answer

Example of a biodegradable polymer pair is :

asked Sep 19, 2013 by meena.p

1 answer

Identify $X$and $Y$ in the following reactions:

asked Sep 19, 2013 by meena.p

1 answer

The $pK_a$ values of four carboxylic acids are given below. Identify the weakest carboxylic acid.

asked Sep 19, 2013 by meena.p

1 answer

The structure of PCC is :

asked Sep 19, 2013 by meena.p

1 answer

The product formed in the reaction of phenol with $Br_2$ dissolved in $CS_2$ at $0^{\circ}$ are :

asked Sep 19, 2013 by meena.p

1 answer

Heating chloroform with aqueous sodium hydroxide solution forms:

asked Sep 19, 2013 by meena.p

2 answers

In which of the following properties, the two enantiomers of lactic acid differ from each other?

asked Sep 19, 2013 by meena.p

1 answer

Assertion (A): $-NH_2$ group of aniline is ortho, para directing in electrophilic substitutions. Reason (R) : $-NH_2$ group stabilizes the arenium ion formed by the ortho, para attack of the electrophile.

asked Sep 19, 2013 by meena.p

1 answer

$C_2H_6 \to C_2H_4+H_2$ above reaction is called as ___________ .

asked Sep 19, 2013 by meena.p

1 answer

Which one of the following gives Prussion blue colour?

asked Sep 19, 2013 by meena.p

1 answer

Cataract and skin cancer are caused by _________ .

asked Sep 19, 2013 by meena.p

2 answers

Which of the following is not added during the extraction of silver by cyanide process?

asked Sep 19, 2013 by meena.p

1 answer

A compound absorbs light in the wavelength region 490-500 nm. Its complementary colour is:

asked Sep 19, 2013 by meena.p

1 answer

Liquid $\underline{X}$ is used in Bubble chamber to detect neutral mesons and gamma photons. Then ,$\underline{X}= \underline{X}$

asked Sep 19, 2013 by meena.p

1 answer

The role of copper diaphragm in Whytlaw-Gray's method is :

asked Sep 19, 2013 by meena.p

1 answer

$Na_2S_2O_3$ reacts with moist $Cl_2$ to from $Na_2SO_4,HCl$ and $\underline{X}.$ Which one of the following is $\underline{X}$?

asked Sep 19, 2013 by meena.p

1 answer

Which one of the following is not correct?

asked Sep 19, 2013 by meena.p

1 answer

How many corner's of $SiO_4$ unit are shared in the formation of three dimensional silicates?

asked Sep 19, 2013 by meena.p

1 answer

Diborane reacts with HCl in the presence of $AlCl_3$ and liberates:

asked Sep 19, 2013 by meena.p

1 answer

Solution "X" contains $Na_2 CO_3$ and $NaHCO_3.\;20 \;ml$ of $X$ when titrated using methyl orange indicator consumed $60\; ml $ of $0.1\;M\;HCl$ solution. In another experiment, $20 \;ml$ of X solution when titrated using phenolphthalein consumed $20\;ml$ of $0.1\;M\;HCl$ solution. The concentration (in mol $lit^{-1}$) of $Na_2CO_3$ and $NaHCO_3$ in X are respectively.

asked Sep 19, 2013 by meena.p

1 answer

Observe the following statements:

asked Sep 19, 2013 by meena.p

1 answer

Match the following

asked Sep 19, 2013 by meena.p

1 answer

For which one of the following reactions,the entropy change is positive?

asked Sep 19, 2013 by meena.p

1 answer

The $pH$ of a buffer solution made by mixing $25\;ml$ of $\;0.02\;M\;NH_4OH$ and $25\;ml$ of $\;0.2\;M\;NH_4Cl$ at $25^{\circ}C$ is : $(pK_b\;of\;NH_4OH=4.8)$

asked Sep 19, 2013 by meena.p

1 answer

The degree of ionization of $\;0.10\;M$ lactic acid is $4.0 \%$

asked Sep 19, 2013 by meena.p

1 answer

Which one of the following plots is correct for a first reaction?

asked Sep 19, 2013 by meena.p

1 answer

The number of octahedral and tetrahedral holes respectively present in a hexagonal close packed (hcp) crystal of 'X' atoms are :

asked Sep 19, 2013 by meena.p

1 answer

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