Chemistry [NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension]: Questions 75 - 80 of 143
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Question 75
Question MCQ▾
The electronic configuration of an ion M2 + is 2,8 and 14. If its mass is 56, the number of neutrons in its nucleus is
Choices
Choice (4) | Response | |
---|---|---|
a. | 32 | |
b. | 30 | |
c. | 34 | |
d. | 42 |
Question 76
Question MCQ▾
The reaction is interpreted as
Choices
Choice (4) | Response | |
---|---|---|
a. | is getting oxidized and is getting reduced | |
b. | is getting reduced and is getting oxidized | |
c. | and are reduced | |
d. | Only is oxidized |
Question 77
Question MCQ▾
Which one of the following metal oxides shows both acidic and basic characters?
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 78
Question MCQ▾
Structures of nuclei of three atoms A, B and C are given below.
A has 90 protons and 146 neutrons B has 92 protons and 146 neutrons C has 90 protons and 148 neutrons
Based on the above data, which of these atoms are isotopes and which are isobars?
Choices
Choice (4) | Response | |
---|---|---|
a. | B and C are isobars, A and B are isotopes | |
b. | A and C are isotopes, B and C are isobars | |
c. | A and C are isotopes, A and B are isobars | |
d. | A and B are isotopes, A and C are isobars |
Question 79
Question MCQ▾
The normality of 0.3 M phosphoric acid is
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.6 | |
b. | 0.3 | |
c. | 0.1 | |
d. | 0.9 |
Question 80
Question MCQ▾
Which of the following gases՚ is known as tear gas?
Choices
Choice (4) | Response | |
---|---|---|
a. | Methyl isocyanides | |
b. | Nitrous oxide | |
c. | Chloropicrin | |
d. | Sulphur dioxide |