Chemistry

Q. The mole fraction of a solute in a 1 m aqueous solution is:

1. 0.0177
2. 0.177
3. 0.0344
4. 1.77

Q.

The distance between an octahedral and tetrahedral void in an fcc lattice is?

1. $\mathrm{a}\surd 3$

2. $\frac{\mathrm{a}\surd 3}{2}$

3. $\frac{\mathrm{a}\surd 3}{4}$

4. $\frac{\mathrm{a}\surd 3}{6}$

Q.

Define hybridization.

Q.

What is inert pair effect? Explain with an example.

Q.

What is De Broglie Hypothesis?

Q. What is the molarity of a 4.9% $H_{3}P{O}_4$ solution by mass? (Density of $H_{3}P{O}_4$ solution = 1.22 g/mL)?

1. 0.61 M
2. 0.05 M
3. 1.22 M
4. 1.54 M

Q.

Balance the equation: ${\mathrm{CaCO}}_3+\mathrm{HCl}\to {\mathrm{CaCl}}_2+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$

Q. The volume of gases evolved when dil. $H_{2}S{O}_4$ is electrolysed when 2F of charge is passed at STP is:

1. 33.6 L
2. 44.8 L
3. 22.4 L
4. 11.2 L

Q.

What do you mean by polar protic and polar aprotic solvents? What are some examples of these?

Q. The compound which shows metamerism is:

1. $C_3{H}_{8}O$
2. $C_3{H}_{6}O$
3. $C_5{H}_{12}$
4. $C_4{H}_{10}O$

Q.

What is the angular momentum of an electron in d orbital?

Q.

Give an example of a redox reaction. Indicate the substance that is oxidized and that is reduced.

Q. Crystal field stabilization energy for high spin $d^4$ octahedral complex is:

Q. The volume of a gas at STP is $1.12\times {10}^{-7}\text{cc}$. The number of molecules in it will be:

1. $3.1\times {10}^{20}$
2. $3.01\times {10}^{12}$
3. $30.1\times {10}^{13}$
4. $3.01\times {10}^{24}$

Q.

What is formality? Explain with example.

Q. Which one of the following trihalide does not exist?

1. $BC{l}_3$
2. $BB{r}_3$
3. $Tl{I}_3$
4. $AlC{l}_3$

Q.

How to calculate the energy of a photon?

Q. Consider the bcc unit cells of the solids $1$ and $2$ with the position of atoms as shown below. The radius of atom $B$ is twice that of atom $A$. The unit cell edge length is $50\%$ more in solid $2$ than in $1$. What is the approximate packing efficiency in solid $2$?

1. $65\%$
2. $90\%$
3. $75\%$
4. $45\%$

Q. Find the molality of 15% (w/w) solution of $H_{2}S{O}_4$.

1. 1.09 m
2. 2.05 m
3. 1.64 m
4. 1.80 m

Q.

What is the molar mass of iron?

Q.

The vapour density of a mixture containing $N{O}_2$ and $N_2{O}_4$ is $27.6$. Mole fraction of $N{O}_2$ in the mixture is:

1. $0.2$
2. $0.4$
3. $0.6$
4. $0.8$

Q. Which of the following given compounds can exhibit tautomerism ?

1. I and II
2. I , II and III
3. I and III
4. II and III

Q.

What is meant by BOD and COD?

Q.

What are the Limitations of First Law of Thermodynamics?

Q.

What is rate constant?

Q.

What is the order of stability of carbanion?

Q. Reactivity order for $S_{N}1$ is:

1. iii > i > ii > iv
2. iv > iii > ii > i
3. i > ii > iii > iv
4. ii > i > iii > iv

Q.

Explain why Cp is greater than Cv.

Q. If $E_{A{u}^{+}/Au}^{\circ }$ is 1.69 V & $E_{A{u}^{3+}/Au}^{\circ }$ is 1.40 V, then $E_{A{u}^{3+}/A{u}^{+}}^{\circ }$ will be:

1. 0.19 V
2. 2.945 V
3. 1.255 V
4. None

Q.

Define ebullioscopic constant?