Question

Identify the state and union territory which has the highest density of population.Give reasons​

Answer 1

Answer:

A force of 10 N is applied on the pedal of a cycle which is at a distance of 30 cm from the axle of the wheel. Calculate the moment of force.

Answer 2

Answer:

hydrated salt. When this salt

kept in open air, it loses water molecules in a process called efflorescence

When dissolved in water it forms a strong base and a weak acid, 2

1. What is the compound, X?

(a)NaHCO,

2. The compound Y is

(b) Na₂CO

(a) NaHCO₂)

3. What is the nature of the solution formed by dissolving Y in water?

(b) Na CO₂

(b) Acidic

(c) Na CO₂ 10H₂0

(c) Neutral

(a) Alkaline

4.

Identify the compound, Z

(a) CO₂

Assertion and Reason:

In the following questions, a statement of assertion (A) is followed by a statement of reason

correct choice as:

(b) H₂CO

(d) NaCl

(d) NaCl

(d) It remains insoluble

(d) H₂0

IV.

(R). Mark

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (

(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of

assertion(A).

(c) Assertion (A) is true but reason (R) is false.

(d) Assertion (A) is false but reason (R) is true.

1. Assertion: The height of an object is always considered positive.

Reason: An object is always placed above the principal axis in this upward direction

2. Assertion: Veins have thin walls to collect blood from different organs

Reason: Blood in veins are not under pressure.

3. Assertion: During electrolysis of concentrated aqueous solution of sodium chloride, hydrogen is

produced at anode and chlorine gas is produced at cathode.

Reason: lons get attracted to oppositely charged electrodes

4. Assertion: All proteins in our food are digested in small intestine only.

Reason: The protein digesting enzymes are released into small intestine.

5. Assertion: Plaster of Paris is used by doctors for setting fractured bones

Reason: When Plaster of Paris is mixed with water and applied around the fractured limbs, it set

hard mass.

6. Assertion: The mirror used in search lights are concave mirrors.

Reason: In concave spherical mirrors the image formed is always virtual.