Q1. Which among the following is false about alpha particles?
(a) They have high ionizing power
(b) They have high penetrating power
(c) They have high kinetic energy
(d) They are positively charged helium nuclei
Q2. Which among the following is not a characteristic of oxidation reaction?
(a) It involves addition of hydrogen
(b) It involves addition of oxygen
(c) It involves loss of electrons
(d) It involves addition of electronegative element
Q3. Soda water was invented by –
(a) Tivadar Puskas
(b) Joseph Priestley
(c) Petrache Poenaru
(d) James Leonard Plimpton
Q4. The mass of proton and mass of ________ is same.
(d) Alpha particle
Q5. Using which of the following processes can one separate a solute from its solution?
Q6. Radioactivity is measured by-
(b) Geiger Counter
Q7. Process of solid camphor into camphor vapour is called-
Q8. Which one of the following is liquid at ordinary temperature?
Q9. Percentage of Silver in German Silver is:
(d) None of these
Q10. Which one of the following polymers is used for making bullet-proof windows?
Sol. Alpha particles made of 2 protons and 2 neutrons and they have low penetrating power.
Sol. Oxidation is loss of eletrons and addition of oxygen. It also involve addition of electronegative element.
Sol. Soda water was invented by Joseph Priestley.
Sol.Protons and neutrons have nearly the same mass while electrons are much less massive.
Sol.Evaporation can separate a solute from its solution.
Sol. The Geiger-Muller Counter also called a Geiger Counter, is an instrument used for detection and measurement ionizing radiation.
Sol. Solid camphor directly changes into camphor vapour and this process is called sublimation. The sublimation is the process in which some substances upon heating directly changes into vapour from and when cooled again directly turns into solid form.
Sol. Mercury is the only common metal which is liquid at ordinary temperature.
Sol. German Silver or Nickel silver is an alloy consisting 50% Copper, 35% Zinc and 15% Nickel. It doesn’t have silver.
Sol. Bullet-resistant glass is made or manufactured by using polycarbonate, thermoplastic and layers of laminated glass.