Which of the following is the most basic oxide?

1. $A{l}_2{O}_3$

2. $S{b}_2{O}_3$

3. $B{i}_2{O}_3$

4. $Se{O}_2$

The orientation of an atomic orbital is governed by:

1. azimuthal quantum number

2. spin quantum number

3. magnetic quantum number

4. principal quantum number

Which of the following is not a correct statement?

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:

1. 2

2. 3

3. 4

4. 1

Which one of the following orders is not in accordance with the property stated against?

1. \(\mathrm{F}_2>\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{I}_2: \text { Oxidising power }\)$$

2. \(\mathrm{Hl}>\mathrm{HBr}>\mathrm{HCl}>\mathrm{HF}: \text { Acidic property in water }\)

3. ${}_{}$\(\mathrm{F_2>C l_2>B r_2>I_2: \text { Electronegativity }}\)

4. ${}_{}$\(\mathrm{F_2>C l_2>B r_2>I_2: \text { Bond dissociation energy }}\)

Identify the species that is not isostructural with SiCl₄:

1. SCl₄
2. SO₄²⁻
3. PO₄³⁻
4. NH₄⁺

The IUPAC name of  is : 

1. 3, 4-Dimethylpentanpyl chloride

2. 1-Chloro-1-oxo-2,2-dimethylpentane

3. 2-Ethyl-3-methylbutanoyl chloride

4. 2, 3-Dimethylpentanoyl chloride

What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?

1. 16

2. 24

3. 32

4. 8

Pineapple (annanas) fruit develops from:

Golden rice is a promising transgenic crop. When released for cultivation, it will help in:

1. alleviation of vitamin-A deficiency

2. pest resistance

3. herbicide tolerance

4. producing a petrol-like fuel from rice