Question

Question 1. Choose the correct option: a) Which of the following expand the most on heating? (1) Solid (ii) Liquids (iii) Gases (iv) None of these b) During summers, we should wear (i) black (ii) maroon (ii) white (iv) grey clothes. c) The reason why the surface of tea pot is made shiny is that, it : (1) absorbs heat from surroundings (ii) minimizes heat loss (iii) increases heat radiation (iv) maximises heat loss d) Ventilation of rooms in our house take place due to: (i) conduction (ii) convection (iii) radiation (iv) thermal expansion e) The type of reflection take place on a highly polished surface is : (1) regular (ii) normal (iii) irregular (iv) diffused f) The angle between the incident ray and the reflected ray is 80 degrees The angle of incidence is: (1) 80 () 160 (iii) 40⁰ (iv) 60° g) Which of the following colours is absorbed by white coloured objects? (i) red (ii) blue (iii) violet (iv) no colour h) The image formed by a plane mirror is: (i) virtual (ii) magnified (iii) diminishod (iv) real D) A car moves for 50 seconds at a speed of 20 ms^ . What is the distance travelled by the car'? (i) 100 m (ii) 10, 000m (iii) 1000 m (iv) 1000 km D) A drill while making a hole, undergoes this kind of motion : (1) translatory and periodic (ii) rotational and oscillatory (iii) translatory and rotational (iv) Only rotational​

Answer 1

Answer:

Cotton absorbs sweat from the body, exposing it to atmosphere for easy evaporation

Answer 2

Solid expands more for exzample:- when we heat the ice cube the it converts into liquid and expand as big is the container is.