Red lead is:

1. PbO

2. $Pb{O}_3$

3. $P{b}_3{O}_4$

4. $P{b}_2{O}_3$

Hybridisation states of C in CH₃⁺ and CH₃^- are:

1. $s{p}^2,s{p}^3$

2. $s{p}^3,s{p}^2$

3. $sp,s{p}^2$

4. $s{p}^2,sp$

Which one of the following complexes is outer orbital complex?

1. $\left[Co\right(N{H}_3{)}_6{]}^{3+}$

2. $\left[Mn\right(CN{)}_6{]}^{4-}$

3. $\left[Fe\right(CN)6{]}^{4-}$

4. $\left[Ni\right(NH3{)}_6{]}^{2+}$

A solution made by dissolving 40 g NaOH in 1000 g of H₂O is:

1. 1 molar

2. 1 normal

3. 1 molal

4. None of these

0.1 mol HCl is equal to:

1. 3.65 g

2. 36.5 g

3. 18 g

4. 1.8 g

Which will liberate bromine from a solution of potassium bromide?

1. $l_2$

2. $C{l}_2$

3. $S{O}_2$

4. Hl

Which of the following has the maximum number of unpaired electrons?

1. $v^{3+}$

2. $F{e}^{2+}$

3. $M{n}^{2+}$

4. $C{u}^{+}$

The geometry of XeF₆ is:

1. planar hexagon

2. regular octahedron

3. distorted octahedron

4. square bipyramid

The correct statement with regard to H₂⁺ and H₂^- is:

1. both ${H_2}^{+}<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>{H_2}^{-}$ are equally stable

2. both ${H_2}^{+}<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>{H_2}^{-}$ do not exist

3. ${H_2}^{-}$ is more stable than ${H_2}^{+}$

4. ${H_2}^{+}$ is more stable than ${H_2}^{-}$

2g of a radioactive sample having a half-life of 15 days was synthesised on 1st Jan 2009. The amount of the sample left behind on 1st March 2009 (including both the days) is:

1. 0 g

2. 0.125 g

3. 1 g

4. 0.5 g