Question With Answer Science
1.Which of the following statements is true about the chemical reaction CuP + H2 Cu + H2O, Which takes place in the presence of heat ?
(A) Copper oxide is reduces to copper
(B) Hydrogen is oxidized to water
(C)Hydrogen is being reduced to water
(D) Both ( A )and ( B )
(E) None of these
Ans (C)
2. Find the odd man out.
(A) CaO + Co2 → CaCO3
(B) 2Na + 2H2O → 2HaOH + H2
(C) Mg + CuSO4 → MgSO4 + Cu
(D) CuSO4 + 2NaOH → Cu (OH) 2 + Na2 SOn
(E) None of these
Ans (D)
3. Find the odd man out.
(A)Lactic acid
(B) Citric acid
(C)Oxalic acid
(D) Nitric acid
(E) None of these
Ans (D)
4.Which of the following is true , if a substance has a pH value of 6 ?
(A) The substance is a base
(B)The substance is an acid
(C) The substance is a neutral substance
(D) Both (A) and (B)
(E) None of these
Ans (B)
5.Find the odd man out.
(A) Na2 CO3.10H2O
(B) Na2 CO3
(C) Soda ash
(D) Anhydrous sodium carbonate
(E) None of these
Ans (A)
6.Which of the following is the best conductor of heat ?
(A)Silicon
(B) Lead
(C) Copper
(D) Bromine
(E ) None of these
Ans (C)
7.Mr has _________________valence electrons.
(A) 1
(B) 0
(C) 6
(D) 5
(E) None of these
Ans (B)
8.Which of the following is true ,if element of group 2 of periodic table reacts with the element of group 17 ?
(A)The compound formed conducts electricity
(B) lonic bonding takes place to form the compound
(C) No bonding will take place
(D) Both (A) and (B)
(E) None of these
Ans (D)
9 Which of the following is a saturated hydrocarbon ?
(A)Methane
(B)Ethene
(C)Ethyne
(D) Propane
(E) None of these
Ans (A)
10. Find the odd man out.
(A) Pentane
(B) 2-methylbutane
(C) 2,2- dimethylpropane
(D) 2 - methylpentane
(E) None of these
Ans (D)
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