Practice paper · Paper 1

The similarity between solid, liquid and gas matter is that, they:

1. Aoccupy space
2. Bhave mass
3. Cboth a and b
4. Dhave fixed shape

When 20 g of potassium permanganate is dissolved in 1000ml of water, there is no increase in volume. This observation indicates that:

1. Aparticles of water have spaces between them into which potassium permanganate particles fit.
2. Bparticles of water attract each other.
3. Cparticle of potassium permanganate attracts each other.
4. Dparticles are continuously moving.

Which of the following is not a Liquid-gas Aerosol:

1. Amist
2. Bclouds
3. Csmoke
4. Dfog

The ions present in Na₂CO₃ are:

1. ANa⁺ ; CO₃²⁻
2. BNa²⁺ ; CO₃²⁺
3. CNa⁺ ; CO₃
4. DNa⁺ ; CO₂²⁻

When 6 g of carbon is burnt in 16g oxygen 22g of carbon dioxide is produced. If 6 g of carbon is burnt in 30 g of oxygen then the carbon dioxide produced will be:

1. A22 g
2. B36 g
3. C16 g
4. D6 g

Which of the following statements is incorrect about the structure of an atom? i. the atom is an indivisible particle ii. the atom as a whole is neutral iii. the whole mass of an atom is concentrated in the nucleus. Choose the right option among the following:

1. Ai. and iii
2. Bonly ii
3. Conly i
4. Dii. and iii

Atom of an element have 3 valence electrons in M-shell. The atomic number of this element will be:

1. AZ=3
2. BZ= 15
3. CZ= 18
4. DZ=13

The role of ribosome is:

1. Asite of protein synthesis
2. Bsite of respiration
3. Csite of photosynthesis
4. Dsite of packaging protein