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Published on: 05/12/2020
10th Standard Science Types of Chemical Reactions English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
The value of ionic product of water at 25°C is ____________
1.00 x 1014
1.00 x 10-14
1.00 X 104
1.00 X 10-4
2.
Pb(NO3)2 + 2KI ⟶ Pbl2 + 2KNO3 is a ______________ reaction
neutralization
Precipitation
decomposition
Combustion
3.
When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________
CO
CO2
H2
H2O
4.
Formation of ammonia from nitrogen and hydrogen is an example of __________ reaction.
Thermal decomposition
Combination
Precipitation
Displacement
5.
Match the list I with list II and select the correct answer using the code given below the lists.
| List I | List II |
|---|---|
| A) Thermolysis | 1) 2AgBr ⟶ 2Ag + Br |
| B) Photolysis | 2) HNO3 + NH4OH ⟶ NH4NO3 + H2O |
| C) Electrolysis | 3) 2HgO ⟶ 2Hg + O2 |
| D) Neutralization | 4) 2NaCl ⟶ 2Na + Cl2 |
| A | B | C | D | |
|---|---|---|---|---|
| (a) | 4 | 1 | 2 | 3 |
| A | B | C | D | |
|---|---|---|---|---|
| (b) | 2 | 4 | 1 | 3 |
| A | B | C | D | |
|---|---|---|---|---|
| (c) | 3 | 1 | 4 | 2 |
| A | B | C | D | |
|---|---|---|---|---|
| (d) | 4 | 3 | 2 | 1 |
6.
An element 'A' on exposure to moist air turns to form compound 'B' which is reddish brown. Identify 'A' and 'B'.
'A' is Ag, 'B' is Ag2s
'A' is Cu, 'B' is CuO
'A' is Mg, 'B' is MgO
'A' is Fe, 'B' is Fe2O3
7.
The product formed when calcium oxide reacts with water is
Slaked lime
Carbon dioxide
Calcium oxide
Oxygen gas
8.
Which of the following represents a precipitation reaction?
A(s) + B(s) → C(s) + D(s)
A(s) + B(aq) → C(aq) + D(l)
A(aq) + B(aq) → C(s) + D(aq)
A(aq) + B(s) → C(aq) + D(l)
9.
A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.
i and ii
ii and iii
iii and iv
i and iv
10.
Photolysis is a decomposition reaction caused by __________
heat
electricity
light
mechanical energy
1.
(b)
1.00 x 10-14
2.
(b)
Precipitation
3.
(c)
H2
4.
(b)
Combination
5.
(c)
| A | B | C | D | |
|---|---|---|---|---|
| (c) | 3 | 1 | 4 | 2 |
6.
(d)
'A' is Fe, 'B' is Fe2O3
7.
(a)
Slaked lime
8.
(c)
A(aq) + B(aq) → C(s) + D(aq)
9.
(d)
i and iv
10.
(c)
light
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
