English Medium Class 10 - CBSE Question Bank Solutions

What is “baking powder”?

State two uses of the following compound:

Chlorine

What is the common name of the compound CaOCl₂?

What is bleaching powder?

How is bleaching powder prepared? Write a chemical equation of the reaction involved in the preparation of bleaching powder.

What happens when bleaching powder reacts with dilute sulphuric acid? Give equation of the reaction involved.

Which of the following is treated with chlorine to obtain bleaching powder?

Consider the following substances:

NaCl, Ca(OH)₂, NaHCO₃, NH₃, Na₂CO₃, H₂O, Cl₂, CO₂, CaSO₄.2H₂O, 2CaSO₄.H₂O, CaOCl₂

1. Which two substances combine to form bleaching powder?
2. Which four substances are utilised in the production of washing soda?
3. Which compound represents plaster of Paris?
4. Which compound is a part of baking powder?
5. Which compound is used as an antacid?

Brine is an ____________.

CaOCl₂ will liberate Cl₂ gas in the presence of

(i) CO₂

(ii) HCl

(iii) CO

(iv) NO

The reaction between MnO₂ with HCl is depicted in the following diagram. It was observed that gas with bleaching abilities was released.

The chemical reaction between MnO₂ and HCl is an example of:

Chlorine gas reacts with ____________ to form bleaching powder.

What prevents the backflow of blood inside the heart during contraction?

Single circulation i.e. blood flows through the heart only once during one cycle of passage through the body, is exhibited by

The blood leaving the tissues becomes richer in

Assertion (A): Reaction of Quicklime with water is an exothermic reaction. 

Reason (R): Quicklime reacts vigorously with water releasing a large amount of heat.

Write the number of covalent bonds in the molecule of butane, C₄H₁₀.