List of practice Questions

Anhydrous $ {AlCl_3}$ is prepared from
Anhydrous cobalt (II) chloride is blue in colour but on dissolving in water it changes to pink in colour because
Anhydrous stannous chloride can be prepared by
Angle between the plane of vibration and plane of polarization is
Analogue of mass in rotational motion is
Analysis shows that an oxide ore of nickel has formula $Ni_{0.98} O_{1.00}$ The percentage of nickel as $Ni^{3+}$ ions is nearly
Andalusian fowls have two pure forms ?
An urn contains 7 red and 4 blue balls. Two balls are drawn at random with replacement. If the events are independent, then the probability of getting two red balls is
An urn shaped population age pyramid represents
Anaerobic respiration takes place in
Analogous organs arise due to
An orthogonal matrix is
An oxide $X$ in its normal form is almost non- reactive due to very high $X - O$ bond enthalpy. It resists the attack by halogens, hydrogen and most of acids and metals even at elevated temperatures. It is only attacked by $HF$ and $NaOH$. The oxide $X$ is
An unbiased coin is tossed n times. The probability that head will present itself, odd number of times is
An organic compound (A), $C_2H_5NO_2$ gives on reduction another compound (B) $C_2H_7N$. The reaction of nitrous acid on (B) evolves nitrogen and gives another compound (C) $C_2H_6O$. The compound (C) on oxidation gives acetic acid. The compounds A, B, C are
An organic compound with the formula $C_6H_{12}O_6$ forms a yellow crystalline solid with phenylhydrazine and gives a mixture of sorbitol and mannitol when reduced with sodium. Which among the following could be the compound ?
An open vessel containing air is heated from 27$^\circ$C to 127$^\circ$C. The fraction of air originally present which goes out of it is
An ore after levigation is found to have basic impurities. Which of the following can be used as flux during smelting ?
An open tank with a square base and vertical sides is to be constructed from a metal sheet so as to hold a given quantity of water. The cost of the material will be least when depth of the tank is
An open flask contains air at $27^?C$, calculate the temperature to which it should be heated such that one third of air measured at final temperature escapes out.
An oil-soluble dye is mixed with an emulsion and emulsion remains colourless. Then, it is
An open box with a square base is to be made out of a given quantity of a cardboard of area $c^2$ square units. The maximum volume of the box is (in cubic units)
An object is moving towards a concave mirror of length 24 cm. When it is at a distance of 60 cm from the mirror its speed is 9cm/s, the speed of its image at that instantis
An object is projected in x-y plane from the origin at t=0 and its velocity changes according to relation $\bar{v} = a\hat{i}+bx\hat{j}$. Equation of path of particle is
An object of mass $40\, kg$ and having velocity $ 4\, m s^{-1}$ collides with another object of mass $60\, kg$ having velocity $ 2 \,ms^{-1}$. The loss of energy when the collision is perfectly inelastic