Recent questions tagged 76

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle

asked Jul 8, 2019 by pady_1

1 answer

Which one of the following reacts with concentrated sulphuric acid ?

asked Dec 19, 2018 by pady_1

0 answers

Chloroethane is treated with alc. KOH. The prooduct formed is :

asked Dec 19, 2018 by pady_1

0 answers

What is the appromiate calorific value of water gas in $kcal\; m^{-3}$ ?

asked Dec 19, 2018 by pady_1

0 answers

Dry distillation of calcium acetate and calcium formate forms :

asked Dec 11, 2018 by pady_1

0 answers

Which of the following is a redox reaction ?

asked Dec 11, 2018 by pady_1

0 answers

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inner-orbit jumps of the electron for Bohr orbits in an atom of hydrogen ?

asked Dec 11, 2018 by pady_1

0 answers

Phenol on treatment with $CO_2$ in the presence of $NaOH$ followed by acidification produces a compound $X$ as the major product. $X$ on treatment with $(CH_3 CO_2)O$ in presence of catalytic amount of $H_2SO_4$ produced :

asked Dec 11, 2018 by pady_1

0 answers

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

asked Dec 11, 2018 by pady_1

0 answers

The area (in sq. units) of the region $\{ (x,y) : y^2 \geq 2x $ and $x^2 + y^2 \leq 4x, \; x \geq 0, \; y \geq 0 \}$ is :

asked Dec 11, 2018 by pady_1

1 answer

The area (in square units) of the region bounded by the curves $y + 2x^2 =0$ and $y+3x^2 =1$, is equal to :

asked Dec 11, 2018 by pady_1

1 answer

The correct statement for the molecule, $CsI_3$ is:

asked Dec 11, 2018 by pady_1

0 answers

This question has statement I and statement II. Of the four choices given after the statements, choose the one that best describes the two statements. Statement- I: Higher the range, greater is the resistance of ammeter. Statement- II: To increase the range of ammeter, additional shunt needs to be used across it.

asked Dec 11, 2018 by pady_1

0 answers

Ortho-Nitrophenol is less soluble in water than p- and m- Nitrophenols because :

asked Dec 11, 2018 by pady_1

0 answers

The hybridization of orbitals of N atom in $NO_3^-, NO_2^+$ and $NH_4^+$ are respectively :

asked Dec 11, 2018 by pady_1

0 answers

Let $f : R \to R$ be a continuous function defined by $f(x) = \frac{1}{e^x + 2e^{-x}}$. Statement-1 : $f(c) = \frac{1}{3}$, for some $c \in R$. Statement-2 : $0 < f(x) \leq \frac{1}{2 \sqrt{2}}$, for all $x \in R$

asked Dec 11, 2018 by pady_1

0 answers

Three distinct points A, B and C are given in the 2-dimensional coordinate plane such that the ratio of the distance of any one of them from the point (1, 0) to the distance from the point (-1, 0) is equal to $\frac{1}{3}$. Then the circumcentre of the triangle ABC is at the point

asked Nov 29, 2018 by pady_1

0 answers

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer The value of the unknown resistor R is

asked Nov 29, 2018 by pady_1

0 answers

A particle is projected at $60^{\circ}$ to the horizontal with a kinetic energy $K$. The kinetic energy at the highest point is :

asked Nov 29, 2018 by pady_1

0 answers

Among the following mixtures, dipole - dipole as the major interaction, is present in :

asked Nov 13, 2018 by pady_1

0 answers

The oxidation state of $Cr$ in $[Cr(NH_3)_4 Cl_2]^+$ is :

asked Nov 5, 2018 by pady_1

0 answers

Which of the following sets of quantum numbers is correct for an electron in 4f orbital ?

asked Nov 5, 2018 by pady_1

1 answer

Which one of the following elements is unable to form $MF_6^{3-}$ ion ?

asked Aug 21, 2018 by pady_1

1 answer

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?

asked Aug 21, 2018 by pady_1

1 answer

The taq polymerase enzyme is obtained from

asked Aug 21, 2018 by pady_1

1 answer

Match the following list of microbes and their importance -

asked Aug 21, 2018 by pady_1

1 answer

In the following reaction, the product (A)

asked Aug 20, 2018 by pady_1

1 answer

Which of the following statements about the interstitial compounds is incorrect ?

asked Aug 20, 2018 by pady_1

1 answer

The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order :

asked Aug 20, 2018 by pady_1

3 answers

Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, $NO_2^-, NO_3^-, NH_2^-, NH_4^+, SCN^-$ ?

asked Aug 16, 2018 by pady_1

3 answers

Oxidation states of P in $H_4P_2O_5,H_4P_2O_6,H_4P_2O_7$, are respectively:

asked Jul 26, 2018 by pady_1

1 answer

Copper crystallizes in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm ?

asked Jul 26, 2018 by pady_1

1 answer

In a reaction of aniline a coloured product (C) was obtained. The structure of (C) would be -

asked Jul 26, 2018 by pady_1

0 answers

Sulphide ores of metals are usually concentrated by Froth Flotation process. Which one of the following sulphide ores offers and exception and is concentrated by chemical leaching ?

asked Jul 26, 2018 by pady_1

1 answer

Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields:-

asked Jul 25, 2018 by pady_1

0 answers

The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is :-

asked Jul 24, 2018 by pady_1

1 answer

The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl, using :-

asked Jul 24, 2018 by pady_1

2 answers

Which of the following pairs of compounds are enantiomers :

asked Jul 24, 2018 by pady_1

1 answer

In $NO_3^-$ ion number of bond pair and lone pair of electrons on nitrogen atom are : -

asked Jul 23, 2018 by pady_1

1 answer

Specific volume of cylindrical virus particle is $6.02 \times 10^{–2} cc/gm$. Whose radius and length are 7 Å & 10Å respectively. If $N_A = 6.02 \times 10^{23}$. Find mol. wt. of virus : -

asked Jul 20, 2018 by pady_1

1 answer

$d\pi-p\pi$ bond present in :

asked Jul 20, 2018 by pady_1

1 answer

Number of isomers of $[Pt(NH_3)_4][CuCl_4]$ complex are :

asked Jun 15, 2018 by pady_1

1 answer

Find the odd one out

asked Dec 31, 2015 by pady_1

0 answers

The pie chart shows the amount of time each day that Jethro spends on various activities. If this information were displayed using a bar graph with hours on the vertical axis, what would be the height of the bar for work?

asked Dec 31, 2015 by pady_1

0 answers

Ankur is travelling to Bangaluru and has already traveled 1344 kms. If 36 % of his journey is still remaining, how many kilometers does he still have to travel?

asked Dec 31, 2015 by pady_1

1 answer

Find the following: $\large\frac{11}{18}$ of $3 \large\frac{9}{9}$

asked Dec 31, 2015 by pady_1

0 answers

Amit bought 7 packs of red bouncy balls, 5 packs of yellow bouncy balls, and 2 packs of green bouncy balls. There were 15 bouncy balls in each package. How many bouncy balls did Amit buy in all?

asked Dec 31, 2015 by pady_1

0 answers

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