List of practice Questions

Ammonia gas dissolves in water to form $ NH_{4}OH$ . In this reaction water acts as

The enthalpies of combustion of carbon and carbon monoxide are $ -393.5$ and $ -283\,kJ\, mol^{-1}$ respectively. The enthalpy of formation of carbon monoxide per mole is

A solid is made of two elements $X$ and $Z$. The atoms $Z$ are in $CCP$ arrangement while the atoms $X$ occupy all the tetrahedral sites. What is the formula of the compound?

During the evaporation of liquid

The structure of $PF_{5}$ molecule is

A long straight wire carrying a current of 30 A is placed in an external uniform magnetic field. of induction $ 4\times {{10}^{-4}} $ T. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesia at a point 2.0 cm away from the wire is $ ({{\mu }_{0}}=4\pi \times {{10}^{-7}}H/m) $

For the square planar complex $[M(a)(b)(c)(d)]$ (where, $M =$ central metal and $a, b, c$ and $d$ are monodentate ligands), the number of possible geometrical isomers are

The discovery of which of the following group of elements gave death blow to the Newland's law of octaves?

Which of the following statements is correct? Dielectric constant of $ {{H}_{2}}{{O}_{2}} $

The electronic configuration of a dipositive ion $ {{M}^{2+}} $ is $2, 8, 14$ and its mass number is $56$. The number of neutrons present is

A heavy stone hanging from a massless string of length $15\,m$ is projected horizontally with speed $147 \,m/s$. The speed of the particle at the point where the tension in the string equals the weight of the particle is?

A hypothetical experiment conducted to determine Youngs formula $ Y=\frac{\cos \theta {{T}^{x}}.\tau }{{{l}^{3}}} $ . If Y = Youngs modulus, T = time period, t = Torque and $ l= $ length, then find the value of $ x $ .

The heat of formation of $ C{{O}_{2}} $ is $ -95\text{ }kcal $ . The amount of carbon which on burning will evolve 1000 kcal is

Choose the reagent to carry out the reaction. $ C{{H}_{3}}C\equiv CC{{H}_{3}}\xrightarrow[{}]{{}}\underset{cis\text{ }form}{\mathop{C{{H}_{3}}CH=CHC{{H}_{3}}}}\, $

Which of the following would not form upon electrolysis of aqueous solution of potassium propanoate?

Which statement best explains why A is more acidic than B?

Among the following molecules or ions, which has the longest $ C-N $ bond?

Which of the following compounds can exist in enantiomeric (i.e., D and L) forms?

lodoform test is not answered by:

The most extensively used bacteria in genetic engineering is

Hydrogen peroxide is prepared in the laboratory by:

Which of the following is the correct electronic configuration of $Cr$?

A gas has a vapour density $11.2$. The volume occupied by 1 gm of gas at NTP is:

A single slit Fraunhofer diffraction pattern is formed with white light. For what wavelength of light, the third secondary maximum in the diffraction pattern coincides with the second secondary maximum in the pattern for red light of wavelength $ 6500\, ?$ ?

A radioactive element has half-life period of $600$ yr. After $3000$ yr, what amount will remain?