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Deepak Rock
@deepak-rock
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Joined: Aug 6, 2021
Last seen: Sep 10, 2021
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Topics: 1742 / Replies: 303
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Topic
Balance the following chemical equations: (a) HNO3 + Ca(OH)2 ➝ Ca(NO3)2 + H2O (b) NaOH + H2SO4 ➝ Na2SO4 + H2O
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 184
Topic
Difference between Distance and Displacement.
5 years ago
Forum
Science
Replies: 0
Views: 345
Topic
Difference between Speed and Velocity.
5 years ago
Forum
Science
Replies: 0
Views: 306
Topic
A train starting from a railway station and moving with uniform acceleration attains a speed of 40 k/hr in 10 minutes. Find its acceleration in the units of m/s.
5 years ago
Forum
Science
Replies: 0
Views: 365
Topic
Which statement is true? (a) distance is a vector quantity (b) magnitude of distance is smaller than displacement (c) magnitude of is equal to magnitude of displacement
5 years ago
Forum
Science
Replies: 0
Views: 342
Topic
Under what condition is the magnitude of average velocity of an object equal to its average speed?
5 years ago
Forum
Science
Replies: 0
Views: 114
Topic
Give five point of difference between prokaryotic cells and eukaryotic cells. Explain it.
5 years ago
Forum
Science
Replies: 0
Views: 229
Topic
Explain hypertonic solution and isotonic solution.
5 years ago
Forum
Science
Replies: 0
Views: 359
Topic
Transfer the following into chemical equations and balance them: (a) Hydrogen gas combines with nitrogen to form ammonia. (b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 99
Topic
What is a balanced chemical equation? Why should chemical equations be balanced?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 124
Topic
What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer. (a) Hydrogen gas and iron chloride are produced.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 292
Topic
Fe2O3 + 2Al ➝ Al2O3 + 2Fe The above reaction is an example of:
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 172
Topic
Which of the following statements about the reaction given below are incorrect? 2PbO(s) + C(s) ➝ 2Pb(s) + CO2(g) (i) Lead is getting reduced. (ii) Carbqn dioxide is getting oxidised.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 143
Topic
Magnesium ribbon burns with a dazzling flame in air (or oxygen) and changes to a white substance magnesium oxide. Is magnesium being oxidised or reduced in this reaction?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 153
Topic
Identify the substances that are oxidised and the substances that are reduced in the following reactions:
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 111
Topic
Give one example of the double displacement reaction.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 102
Topic
Why does the colour of copper sulphate change when an iron nail is dipped in it?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 95
Topic
When you mix solutions of lead (II) nitrate and potassium iodide. (a) What is the colour of the precipitate formed? Name the compound involved. (b) Write a balanced chemical equation for the reaction.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 137
Topic
Why is the amount of gas collected in one of the test tubes in Activity 7 double of the amount collected in the other? Name the gas.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 129
Topic
A solution of the substance ‘X’ is used for whitewashing. (a) Name the substance ‘X’ and write its formula. (b) Write the reaction of the substance ‘X’ with water.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 359
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