Q1. The bright, attractive part of a flower is
Q2. Jute fiber is obtained from which part of the plant?
Q3. The roots of a banyan tree are
(a) climbing roots
(b) stilt roots
(c) breathing roots
(d) adventitious roots
Q4. Water that is absolutely pure and free from any impurity is known as
(a) distilled water
(b) mineral water
(c) spring water
(d) boiled water
Q5. Which is not a reversible change?
(a) Water to water vapor
(b) Melting of iron
(c) Burning of Kerosene
(d) Condensation of water vapor
Q6. Which of the following formulae represents a molecule of ozone?
(d) None of these
Q7. Which of the following is an alloy?
(c) Stainless steel
Q8. When a force of 1 N acts perpendicularly on an area of 1 m². the pressure is
(a) 1 joule
(b) 1 pascal
(c) 1 watt
(d) 1 farad
Q9. A force applied to a machine to do mechanical work is called.
Q10. A comb attracts small pieces of paper due to
(a) frictional force
(b) magnetic force
(c) gravitational force
(d) electrostatic force
Sol. The open flower’s most attractive parts are the petals.
Sol. The jute fiber comes from the stem and ribbon (outer skin) of the jute plant.
Sol. Prop root are thick pillar-like adventitious roots which grow from and support heavy horizontal branches of Banyan tree. Initially the roots are aerial and hygroscopic.
Sol. Water which is absolutely pure and free from any impurity is known as distilled water.
Sol. Burning of Kerosene is not a reversible change.
Sol. An ozone molecule consists of three oxygen atoms (O3).
Sol. Stainless steel is an iron alloy with added elements such as chromium, nickel, silicon, manganese, nitrogen and carbon.
Sol. 1 Pascal = 1 Newton / 1 Square meter.
Sol. The force applied on a machine to do work is called the effort.
Sol. when plastic comb attracts small pieces of paper due to electrostatic forces.