Flame test of Copper Halide with bluish-green color identify the presence of ______...? Mcqs

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Flame test of Copper Halide with bluish-green color identify the presence of ______...?

(A) Halogen
(B) Hydrogen

(C) Copper
(D) B and C

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What is the smallest unit of life...?

(A) Cell
(B) Atom

(C) Tissue
(D) Organ

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A burning candle is an example of ______ state of matter....?

(A) Gas
(B) Liquid

(C) Solid
(D) All three

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Which of the following is an example of compound machine...?

(A) Scissors
(B) Pliers

(C) Pulley
(D) None

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Refrigerator works on the phenomenon of ________ of heat transfer....?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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The Earth’s axis is an imaginary ______...?

(A) Square
(B) Line

(C) Circle
(D) Dot

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The process in which solid directly changes to gas is called...?

(A) Distillation
(B) Filtration

(C) Sublimation
(D) Crystallization

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What happens when two opposite poles of magnets are brought close to each other...?

(A) They repel
(B) They attract

(C) They make an electric current flow
(D) None

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The presence of ice in which region of the moon has been conclusively established...?

(A) Southern pole region
(B) Northern pole region

(C) Equator
(D) All of the above

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Approximate age of earth is ________...?

(A) 4.14 billion years
(B) 4.64 billion years

(C) 4.54 billion years
(D) 4.34 billion years

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