An electrolyte which completely dissociates into ions is:

A. Alcohol

B. Carbonic acid

C. Sucrose

D. Sodium hydroxide

Give two reasons to explain as to why we need to conserve our forest resource.

State why concentrated sulphuric acid is not used for drying ammonia gas.

Give three reasons as to why airways are becoming a popular means of transport in modern India.

Briefly explain the following term: Reflex action

Identify the substances underlined: The catalyst used to oxidise ammonia.

Give a geographical reason: Wind is a common agent of soil erosion in arid regions

State one relevant observation: Action of concentrated nitric acid on copper.

Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5A current in 5 minutes.

Give a reason for each of the following: Mangaluru is cooler than Delhi in summer season.

How does the angle of deviation formed by a prism change with the increase in the angle of incidence?

Draw a graph showing the variation in the angle of deviation with the angle of incidence at a prism...

Ionic compounds have a high melting point.

The immunity acquired by providing readymade antibodies from outside for treating certain infectious diseases.

Cellular components of blood containing haemoglobin.

Give appropriate biological / technical term.

Mr. Bedi visits the market and buys the following articles:

• Medicines costing ₹ 950, GST @ 5%
• A pair of shoes costing ₹ 3000, GST @ 18%
• A Laptop bag costing ₹ 1000 with a discount of 30%, GST @ 18%.

i....

What do you understand by the following statements:

1. The heat capacity of the body is 60 JK^-1.
2. The specific heat capacity of lead is 130 Jkg^-1K^-1.