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Published on: 05/03/2020
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 organic acid present in Vinegar is ___________ acid.
methanoic
ethanoic
Propanoic
Butanoic
2.
Which one of the following changes blue litmus red?
CH3OH
CH3COCH3
CH3COOH
CH3CHO
3.
4.
Which of the following reactions is not feasible?
Zn + CuSO4 ⟶ ZnSO4 + Cu
2Ag + Cu (NO3)2 ⟶ AgNO3 + Cu
Fe + CuSO4 ⟶ FeSO4 + Cu
Mg + 2HCI ⟶ MgCl2+ H2
5.
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
6.
Formation of ammonia from nitrogen and hydrogen is an example of __________ reaction.
Thermal decomposition
Combination
Precipitation
Displacement
7.
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 |
8.
Solubility of CaO _____ with the increases in temperature.
increases
decreases
remains constant
None of these
9.
Which is a non-aqueous solution?
sugar in water
common salt in water
sulphur in carbon disulphide
None
10.
Example for solid in solid ___________
Soda water
Camphor in air
Charcoal
alloy
11.
8% of NaCI solution is
8g of NaCl in 100g of water
8g of NaCl in 92g of water
92g of NaCl in 8g of water
92g of NaCl in 100g of water
12.
The carbon content in wrought iron is _________
0.25 - 2%
0.25 - 17%
2 - 3.5%
3 - 4.5%
13.
Slag is.
Metal + Ore
Ore + Gangue
Flux + Gangue
Ore + Flux
14.
Mass of an electron is
9.1083 x 10-31kg
9.1083 x 10-24kg
1.67262 x 10-27kg
1.67 x 10-24gm
15.
Pick out the isotopes among the following pairs
6C13, 7N14
18Ar4, 20Ca4
6C12, C614
5B12, 6C13
1.
(b)
ethanoic
2.
(c)
CH3COOH
3.
(b)
4.
(b)
2Ag + Cu (NO3)2 ⟶ AgNO3 + Cu
5.
(b)
1.00 x 10-14
6.
(b)
Combination
7.
(c)
| A | B | C | D | |
|---|---|---|---|---|
| (c) | 3 | 1 | 4 | 2 |
8.
(b)
decreases
9.
(c)
sulphur in carbon disulphide
10.
(d)
alloy
11.
(b)
8g of NaCl in 92g of water
12.
(a)
0.25 - 2%
13.
(c)
Flux + Gangue
14.
(a)
9.1083 x 10-31kg
15.
(c)
6C12, C614
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
