Why is ice at $273 K$ more effective in cooling than water at the same temperature?

Important Questions on Matter in Our Surroundings

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>Higher Order Thinking Skills (HOTS) Questions>Q 4

State the amount of heat lost by the human body during evaporative respiration. From which physical property did you get this value?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>Higher Order Thinking Skills (HOTS) Questions>Q 5

Arrange the following in the increasing order of moisture absorbing capacity of clothes: nylon, terry-cot, polyester, cotton.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>Higher Order Thinking Skills (HOTS) Questions>Q 6

Why do people sprinkle water on the open ground or roof after a hot sunny day?

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>Higher Order Thinking Skills (HOTS) Questions>Q 7

Amit spilled a bottle of ammonia in one corner of the laboratory. Soon the whole laboratory was filled up with pungent irritating odour. The students immediately opened the doors and windows and switched on the exhaust fans. After some time, the students got relief. Explain what did actually happen and name the phenomenon which is responsible for this.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>Higher Order Thinking Skills (HOTS) Questions>Q 8

Ordinary water boils at