11th Standard Syllabus & Materials
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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A
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Published on: 10/11/2020
11th Standard Chemistry Hydrogen English Medium Free Online Test One Mark Questions 2020 - 2021
Download Tamil Nadu 11th Standard Chemistry 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 Chemistry Test
1.
Hardness of water cannot be removed by ______________
treating with washing soda
adding calgon
boiling
addition of chlorine
2.
FeSO4 contains _________ molecules of water of hydration.
5
7
10
12
3.
The structure of water molecule is __________
bent
tetrahedral
distorted octahedral
trigonal bi pyramidal
4.
Match the list I with List II and select the correct answer using. the code given below the lists.
| List I | List II | ||
| A | Calcium hydrogen carbonate | 1 | Permanent hardness |
| B | Calcium chloride | 2 | Chelating |
| C | Sodium aluminium silicate | 3 | Temporary hardness |
| D | EDTA | 4 | Ion exchange method |
| A | B | C | D |
| 1 | 3 | 2 | 4 |
| A | B | C | D |
| 4 | 3 | 1 | 2 |
| A | B | C | D |
| 3 | 1 | 4 | 2 |
| A | B | C | D |
| 2 | 1 | 4 | 3 |
5.
Consider the following statements
1. Water has high dielectric constant.
2. Water has strong intra molecular hydrogen bonding
3. Water is an Universal solvent
Which of the following statement(s) given above is are not correct
1 & 3
only 1
2 & 3
only 2
6.
In which of the following compounds does hydrogen has an oxidation state of -1?
CH4
NH3
HCl
CaH2
7.
Hydrogen acts as a reducing agent and thus resembles ______________
halogens
chalcogens
inert gases
alkali metals
8.
Hydrogen burns in air with a - flame.
light bluish
yellow
green
none of these
9.
The conversion of atomic hydrogen to dihydrogen is a __________ change.
endothermic
exothermic
photochemical
nuclear
10.
___________ torches is/are used in cutting and welding of a steel.
Oxy acetylene
Oxy hydrogen
both a and b
neither a nor b
11.
The half life period of Tritium is ___________
12.33 secs
12.33 mins
12.33 hrs
12.33 years
12.
_____________ is known as heavy hydrogen.
protium
deuterium
tritium
both a and b
13.
The most abundant element in the universe is _________.
aluminium
mica
dihydrogen
nitrogen
14.
In solid ice, oxygen atom is surrounded _____________
tetrahedrally by 4 hydrogen atoms
octahedrally by 2 oxygen and 4 hydrogen atoms
tetrahedrally by 2 hydrogen and 2 oxygen atoms
octahedrally by 6 hydrogen atoms
15.
The hybridisation of oxygen atom is H2O and H2O2 are, respectively __________
sp and Sp3
sp and sp
Sp and Sp2
Sp3and Sp3
16.
For decolorisation of 1 mole of acidified KMnO4, the moles of H2O2 required is ___________
\(\frac{1}{2}\)
\(\frac{3}{2}\)
\(\frac{5}{2}\)
\(\frac{7}{2}\)
17.
A commercial sample of hydrogen peroxide marked as 100 volume H2O2, it means that _____________
1 ml of H2O2 will give 100 ml O2 at STP
1 L of H2O2 will give 100 ml O2 at STP
1 L of H2O2 will give 22.4 L O2
1 ml of H2O2 will give 1 mole of O2 at STP
18.
The cause of permanent hardness of water is due to _____________
Ca(HCO3)2
Mg(HCO3)2
CaCl2
MgCO3
19.
If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be ______________
1.2 g
2.4 g
3.6 g
\(\sqrt{4.8}\)g
20.
Which of the following statements about hydrogen is incorrect?
Hydrogen ion, H3O+ exists freely in solution.
Dihydrogen acts as a reducing agent.
Hydrogen has three isotopes of which tritium is the most common.
Hydrogen never acts as cation in ionic salts.
1.
(d)
addition of chlorine
2.
(b)
7
3.
(a)
bent
4.
(c)
| A | B | C | D |
| 3 | 1 | 4 | 2 |
5.
(d)
only 2
6.
(d)
CaH2
7.
(d)
alkali metals
8.
(b)
yellow
9.
(b)
exothermic
10.
(c)
both a and b
11.
(d)
12.33 years
12.
(b)
deuterium
13.
(c)
dihydrogen
14.
(a)
tetrahedrally by 4 hydrogen atoms
15.
(d)
Sp3and Sp3
16.
(c)
\(\frac{5}{2}\)
17.
(a)
1 ml of H2O2 will give 100 ml O2 at STP
18.
(c)
CaCl2
19.
(a)
1.2 g
20.
(c)
Hydrogen has three isotopes of which tritium is the most common.
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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