Forwarded from CBSE NOTES 9 10 11 12 (Romeo)
Name the first mineral acid to be discovered
Anonymous Quiz
54%
Hydrochloric acid
30%
Sulphuric acid
16%
Nitric acid
Forwarded from CBSE NOTES 9 10 11 12 (Romeo)
Name the first organic acid which is used in experiment
Anonymous Quiz
41%
Citric acid
43%
Ethanoic acid
16%
Oxalic acid
Forwarded from CBSE NOTES 9 10 11 12 (Romeo)
What we call those base which are soluble in water
Anonymous Quiz
11%
Base
77%
Alkalis
8%
Acid
4%
Non base
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Select the group which shares maximum number of common characters.
Anonymous Quiz
35%
Two individuals of a species
32%
Two species of a genus
23%
Two genera of a family
10%
Two genera of two families
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
A student accidentally spilled a few drops of a solution over the shirt. The area became blue-black because the solution was -
Anonymous Quiz
22%
An acid which burnt the patch of cloth.
50%
Iodine which reacted with starched part of shirt.
18%
Potassium dichromate which oxidised the piece of shirt.
10%
HCl which reacted with metanil pigment of the shirt.
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Why is a time tag of two hours from Gujarat to Arunachal Pradesh?
Anonymous Quiz
52%
Because of India’s east-west extent
23%
Because of India’s north-south extent
16%
Because of India’s proximity to oceans
9%
Because of India’s landmass
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Voting in the Estates General was conducted on the principle of-
Anonymous Quiz
19%
Each member of vote
26%
Male adult franchise
30%
Universal adult franchise
25%
Each estate one vote
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
While computing mean of grouped data, we assume that the frequencies are -
Anonymous Quiz
33%
Evenly distributed over all the class
38%
Centred at the classmarks of the class
22%
Centred at the upper limits of the class
7%
Centred at the lower limits of the class
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
An aeroplane at a height of 600 m passes vertically above another aeroplane at an instant when their angles of elevation at the same observing point are 60º and 45º respectively. How many metres higher is the one from the other?
Anonymous Quiz
19%
286.53 m
42%
274.53 m
31%
253.58 m
8%
263.83 m
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
What was the Napoleonic code known as?
Anonymous Quiz
14%
The Napoleonic code of 1808
23%
The Napoleonic code of 1802
14%
The civil code of 1809
50%
The civil code of 1804
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Consider the following events and arrange them in their
correct chronological order -
I. Swadeshi Movement II. Home Rule Movement III. Anti-Rowlatt Act Movement IV. Khilafat Movement
correct chronological order -
I. Swadeshi Movement II. Home Rule Movement III. Anti-Rowlatt Act Movement IV. Khilafat Movement
Anonymous Quiz
21%
I, II, III, IV
32%
I, II, IV, III
28%
II, I, IV, III
20%
III, I, II, IV
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Transportation in the living organisms is necessary because of the following reasons:
Anonymous Quiz
27%
Food, oxygen, water and other essential substances are distributed through this system.
19%
It displaces the excretory wastes from the cells of the body to the excretory organs.
10%
Temperature and pressure throughout the body are kept uniform.
45%
All of the above.
Forwarded from CBSE NOTES 9 10 11 12 (विशाल कुमार)
Forwarded from CBSE NOTES 9 10 11 12 (Kanishk ......!!!!)
Forwarded from CBSE NOTES 9 10 11 12 (Kanishk ......!!!!)
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Which of the following is incorrect statement about Mendeleev’s classification of elements?
Anonymous Quiz
30%
He could classify all the elements including noble gases.
28%
He left gaps for some yet to be discovered elements.
21%
He predicted the properties of some undiscovered elements.
20%
There was no place for isotopes in his table.
Forwarded from CBSE NOTES 9 10 11 12 (Romeo)
Human eye forms the image of an object at its
Anonymous Quiz
18%
Cornea
16%
Pupil
13%
Iris
52%
Retina
Forwarded from CBSE NOTES 9 10 11 12 (Romeo)
Which of the following is not associated with Fleming's right hand rule
Anonymous Quiz
18%
Magnetic field
29%
Movement
41%
Resistance
12%
induced current
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
A block of ice floats in water such that the temperature of water as well as ice is 0°C. The weight of ice is equal to -
Anonymous Quiz
31%
Weight of water displaced by the immersed part of ice
38%
Volume of water displaced by the immersed part of ice
24%
Weight of water displaced by the complete block of ice
7%
None of these
Forwarded from CBSE NOTES 9 10 11 12 (Sparsh Gupta)
Which of the following statements is not correct?
Anonymous Quiz
23%
All metal carbonates react with acid to give a salt, water and carbon dioxide.
39%
All metal oxides react with water to give salt and acid.
20%
Some metals react with acids to give salt and hydrogen.
18%
Some non-metal oxides react with water to form an acid.