NCST Mock Test Season I Chemistry
NCST Mock Test Season I Chemistry
1] From right to left in Modern Periodic Table
A. Metallic character decreasesB. Effective nuclear charge decreases
C. Atomic mass increases
D. Electronegativity increases
2] An element X has atomic number 54. Choose the correct statement.
A. X and X- belongs to same periodB. X and X- have same number of electrons
C. X and X- have same chemical properties
D. X and X- does not have same chemical properties
3] What is the oxidation number of Cr in CrO5, a blue colored compound?
A. 5B. 6
C. 8
D. 10
4] How many d-electrons are present while writing electronic configuration of Cr?
A. 2B. 3
C. 4
D. 5
5] How many hydrogen does cyclopentadiene have?
A. 5B. 6
C. 7
D. 8
6] Which of the reaction is not possible in saturated carbon compound?
A. Substitution reactionB. Elimination reaction
C. Addition reaction
D. Oxidation reaction
7] Calcium carbide have
A. Covalent bondB. Ionic bond
C. Both (A) and (B)
D. Neither (A) nor (B)
8] When a metal with atomic number of 79 is reacted with concentrated HNO3, the gas evolved is
A. H2B. N2
C. O2
D. None of these
9] Potassium Chloride and Silver Nitrate when mixed, a curdy white precipitate is observed in the solution. The reaction can be regarded as
A. Decomposition reactionB. Double displacement reaction
C. Oxidation reaction
D. Reduction reaction
10] During the process of dilution, 100 litres of water is added to 100 mL of 10 M HCl solution. Find the moles of HCl in final diluted solution
A. 1B. 10
C. 100
D. 1000
11] Out of different structural isomers of pentane, which will have least boiling point?
A. n-pentaneB. iso-pentane
C. neo-pentane
D. None of these
12] A metal hydrogen carbonate is made to react with acid. The gas evolved in the given reaction is bubbled through a pipe in slaked lime solution, then, a white colored species is observed.
A. White colored substance is soda limeB. White colored substance is limestone
C. The gas evolved is NO2
D. The gas evolved is SO2
13] B(OH)3 is a
A. Strong triacidic baseB.Weak monoacidic base
C. Strong tribasic acid
D. Weak monobasic acid
14] In acidic medium, KMnO4 acts as a strong oxidizing agent. How many moles of chlorine gas can be converted to chloride ion using 2 mole of KMnO4 in acidic medium
A. 2B. 5
C. 10
D. 4
15] When lead nitrate is heated in an experiment, a yellow solid residue is found at the bottom of test tube. It also evolves a brown gas which can turn litmus
A. Red to blueB. Blue to red
C. Red to green
D. Blue to violet
16] The moles of oxygen gas required in the complete combustion of neo-butane gas is
A. 4B. 6.5
C. 10
D. 12
17] xHCN + CuSO4 → H2SO4 + Cu(CN)2
Value of x is
B. 2
C. 3
D. 4
18] An element has an atomic number of 15, with which of the following elements will it show similar chemical properties.
A. Be (4)B. Ne(10)
C. N (7)
D. O (8)
19] Ethanoic acid is made to react with iso-propanol in aqueous solution. The product formed have ____ functional group.
A. Carboxylic acidB. Ester
C. Ketone
D. Aldehyde
20] Electronic configuration of O- is
A. 2, 2, 5B. 2, 2, 4
C. 2, 2, 3
D. 2, 2, 6
21] Ammonium acetate solution can have pH of
A. 2B. 7
C. 9
D. 0
22] Formation of ammonia is usually carried out by Haber's process, where nitrogen gas and hydrogen gas are used as reactants. Calculate the maximum amount of ammonia that can be formed when 28 Kg of each reactant is used.
A. 56 KgB. 17 Kg
C. 34 Kg
D. 28 Kg
23] The pH of a HCl solution is 3. If the volume of the HCl solution is 4000 Litres, then find the number of moles of H+ ion in the given solution.
A. 1B. 4
C. 1000
D. 4000
24] In which of the following compound, the oxidation number of Sulphur is +7?
A. Na2S2O8B. H2S2O7
C. H2SO4
D. None of these
25] K2Cr2O7 is converted into K2CrO4, the changes in oxidation number of Cr is
A. 0B. +4
C. +6
D. +8
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