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Science Questions For CTET Exam: 4th July 2018(solutions)

Science Questions For CTET Exam: 4th July 2018(solutions)_30.1
Today, we are providing you the Science Questions, which help you to command over this subjects.Taught many interesting science facts and information and add some fun in a science teaching learning process.This section is not only important for CTET exam but also for other TET Exam i.e UPTET, PTET, REET, DSSSB Exam etc. So, we will provide you the questions which will help you in preparing for Exam.
Q1. The gas used for artificial fruit ripening of green fruit is —
(a) Ethylene
(b) Acetylene
(c) Ethane
(d) Methane
Q2. The three elements most needed in common fertilizers are:
(a) Sulphur, Phosphorous and Sodium
(b) Nitrogen, Potassium and Phosphorous
(c) Phosphorous, Sodium and Nitrogen
(d) Calcium, Phosphorous and Potassium
Q3. Which one of the following metals pollutes the air of a city having large number of automobiles?
(a) Cadmium
(b) Chromium
(c) Lead
(d) Copper
Q4. What is the chemical name for ‘baking soda’?
(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Sodium nitrite
(d) Sodium nitrate
Q5. An atomic pile is used for 
(a) producing X-rays
(b) conducting nuclear fission
(c) conducting thermonuclear fusion
(d) accelerating atoms
Q6. Which of the following gases is present under pressure in soft drinks?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Nitrous oxide
Q7. The substance which does not expand on going from liquid state to solid state is
(a) Water
(b) Cast-iron
(c) Aluminium 
(d) Type metal
Q8. The ratio-active element used in heart pacemakers is
(a) Uranium
(b) Deuterium
(c) Plutonium
(d) Radium
Q9. The element which is commonly used in nuclear for producing electricity by nuclear fission is
(a) Radium
(b) Plutonium
(c) Uranium
(d) Deuterium
Q10. Table salt gets moist during rainy season because
(a) sodium chloride is hygroscopic 
(b) sodium chloride is deliquescent 
(c) sodium chloride contains some quantity of sodium iodide
(d) sodium chloride contains hygroscopic impurities like magnesium chloride
S1. Ans.(a)
Sol. Ethylene gas used for artificial fruit ripening. Acetylene acts like ethylene and accelerates the ripening process.
S2. Ans.(b)
Sol. Nitrogen, phosphorus and potassium, or NPK, are the 3 primary nutrients used in fertilizers.
S3. Ans.(c)
Sol. Metal processing is the biggest source of atmospheric lead. The highest air concentrations of lead are usually found near lead smelters.
S4. Ans.(b)
Sol. Sodium bicarbonate (IUPAC name: sodium hydrogen carbonate), commonly known as baking soda.
S5. Ans.(b)
Sol. An atomic pile or nuclear reactor is used to controlled the nuclear fission to generate energy.
S6. Ans.(c)
Sol. The fizz that bubbles up when you open a soft drink is under pressure carbon dioxide gas .
S7. Ans.(d)
Sol. Type metal is an alloy of lead, tin, and antimony, used for casting type. It does not expand on going from liquid state to solid state.
S8. Ans.(c)
Sol. Plutonium is formed in nuclear power reactors from uranium. Early heart pacemakers used Pu-238 as the power source.

S9. Ans.(c)
Sol. Uranium is used to produce a chemical and nuclear reaction which makes a lot of heat. This heat is used to turn water into steam which turns turbines and thus turbines generates electricity.
S10. Ans.(d)
Sol. Magnesium chloride is the common impurity present in table salt. It is highly hygroscopic and absorbs moisture from air. Because of the presence of MgCl2 in sodium chloride (common/table salt), it becomes wet.