Question 4 :
Complete the following reaction: _____ + Metal → Salt + _____ gas.
Question 7 :
Which one of the following type of medicines is used for treating indigestion?
Question 8 :
What is meant by the half a water molecule in the formula of plaster of paris?
Question 10 :
A solution turns red litmus blue, its pH is likely to be
Question 12 :
Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. Which solution is strongly acidic?
Question 17 :
All metal carbonates and hydrogen carbonates react with acids to give ______, ______ and water.
Question 18 :
What is formed when electricty is passed through aqueous solution of sodium chloride?
Question 19 :
What happens to the stain of curry on a white cloth when soap(basic in nature) is scrubbed on it ?
Question 21 :
A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains
Question 24 :
The reaction of dry slaked lime and chlorine gas gives rise to which important product?
Question 26 :
Complete the following reaction: NaCl + $H_2O$+ $CO_2$ + $NH_3$ → ______ + _________.
Question 29 :
Quick lime, slaked lime or chalk are all alkaline substances so these would be added to the soil by the farmer when the soil is highly acidic.
Question 31 :
Which compound can be used to remove hardness of water permanently?
Question 40 :
What is not present in alkalis for electric flow in solutions?
Question 41 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d1e273b230584979ba4.JPG' />
In the above figure, an allotrope of carbon has been given. Write the name of the substance
Question 42 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d28273b230584979baf.JPG' />
In the given figure, name the carbon compound.
Question 43 :
Ionic compounds conduct electricity in molten or in solution state. Is it TRUE OR FALSE?
Question 45 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d25273b230584979bac.JPG' />
In the given figure, name the carbon compound.
Question 50 :
Carbon and its compounds are some of our major sources of fuels. Is it TRUE OR FALSE?
Question 54 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d20273b230584979ba6.JPG' />
In the above figure, identify the carbon compound.
Question 55 :
Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons.
Question 59 :
The nucleus of carbon holds the shared pair of electrons very strongly. Is it TRUE OR FALSE ?
Question 61 :
Why is the conversion of ethanol to ethanoic acid an oxidation reaction?
Question 62 :
Saturated hydrocarbons will generally give a yellow flame with lots of black smoke while burning. Is it TRUE OR FALSE?
Question 63 :
What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?
Question 64 :
Ethanol and ethanoic acid are carbon compounds of importance in our daily lives. Is it TRUE OR FALSE?
Question 66 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d2d273b230584979bb5.JPG' />
In the given figure, name the compound.
Question 67 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d24273b230584979bab.JPG' />
In the given figure, name the carbon compound.
Question 68 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d20273b230584979ba6.JPG' />
In the above figure, identify the carbon compound.
Question 69 :
Carboxylic acids are basic in nature. Is it TRUE OR FALSE ?
Question 70 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d29273b230584979bb1.JPG' />
In the given figure, name the carbon compound.
Question 72 :
Water is a by product when ethanol reacts with sodium. Is it TRUE OR FALSE?
Question 74 :
Carbon is tetravalent because it has four valence electrons. Is it correct ?
Question 75 :
While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
Question 76 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d23273b230584979baa.JPG' />
In the given figure, a cyclic unsaturated carbon compound is shown. Identify the compound.
Question 77 :
Concentrated sulphuric acid is a hydrating agent. Is it TRUE OR FALSE ?
Question 78 :
The bonds formed by elements of bigger size are more weaker. Is it TRUE OR FALSE ?
Question 79 :
Soaps are sodium salts of long chain carboxylic acids. State TRUE or FALSE.
Question 80 :
The presence of a functional group such as alcohol decides the properties of the carbon compound, regardless of the length of the carbon chain. Is it true or false ?
