Collection of verified questions for Ooshma Avam Ooshma Gatiki under General Science. Includes previous year exam questions with official answer keys and step-by-step solutions.
Which of the following statements is not correct?
When soggy biscuits are kept inside a refrigerator for some time, they become crisp because -
Water in an earthen pot remains cool due to which of the following processes?
Assertion (A): A piece of ice cools a beverage. Reason (R): Ice absorbs latent heat from the beverage for melting, thereby cooling the drink. Select the correct answer from the code given below:
Liquids remain hot or cold for a long duration in a thermos flask because heat loss or gain is prevented by -
Given below are an Assertion (A) and Reason (R) - Assertion (A): Salt is added to cook food at high altitudes. Reason (R): At high altitudes, ambient temperature is low. Which of the following is the correct answer?
Two strips of different metals A and B are riveted together to form a bimetallic strip. On heating, metal A expands more than metal B. If this composite strip is heated, what shape will it assume?
Thermal expansion on heating -
We feel comfortable under a fan in hot weather because -
Consider the following statements - Assertion (A): Light-coloured clothes are preferred in summer. Reason (R): Light colours absorb less heat. Select the correct answer from the code given below:
Assertion (A): Large cold storage plants use ammonia as a refrigerant, whereas domestic refrigerators used chlorofluorocarbons (CFCs). Reason (R): Ammonia can be liquefied at ambient temperatures and low pressures. Code:
Consider the following statements - Assertion (A): If ice accumulates on the freezer, cooling in the refrigerator is severely affected. Reason (R): Ice is a poor conductor of heat. Select the correct answer using the codes given below -
A metal sphere just passes through a circular hole in a metal ring. If the sphere is heated, it gets stuck, but if the metal ring is heated -
An air conditioner installed in a room controls -
If the temperature of air increases, its capacity to absorb water vapour -
On a particular day and time, the temperature in Churu was 48°C and in Shimla was 24°C. Two identical metal cups containing water were kept at 95°C in Churu and 71°C in Shimla. Which of the two cups reached room temperature first?
The safe temperature for keeping food fresh in a refrigerator is -
The function of a thermostat in a refrigerator is to -
When common salt is dissolved in water, the boiling point and freezing point of water will -
Wearing white clothes in summer is more comfortable because -
A thermostat is related to -
A thermostat is a device for maintaining constant _____________?
The value of 50°C on the Fahrenheit scale is -
Normal human body temperature on the Celsius scale is -
Burns caused by steam at 100°C are more severe than burns caused by boiling water at the same temperature because -