A metal X forms a salt XSO _4. The salt XSO _4 forms a clear solu… - Vidyadip

Question

A metal X forms a salt $XSO _4$. The salt $XSO _4$ forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y . Metal X is used in making electric wire and alloys like brass.
a. What do you think metal $X$ could be?
b. Write the name, formula and colour of salt $XSO _4$.
c. What is the blue precipitate Y ?
d. Write a chemical equation of the reaction which takes place when salt $XSO _4$ reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.

✓

Answer

a. Metal X could be copper (Cu).
b. The salt $XSO _4$ is copper sulphate its formula is $CuSO _4$ and it is blue in colour.
c. Copper hydroxide $\left[ Cu ( OH )_2\right]$ is the blue precipitate.
d. $CuSO _4( aq )+2 NaOH ( aq ) \longrightarrow Cu ( OH )_2(s)+ Na _2 SO _4( aq )$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[5 marks Questions]" from Chemical Reactions and Equations→Chemical Reactions and Equations — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

How does food prepared by leaves is utilized by roots? Explain.

Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram.

When a moist slice of bread was kept aside for a few days then some organism grew on it to form a white cottony mass which later turned black. When this slice of bread was observed through a magnifying glass, then fine thread-like projections and thin stems having bulb-like structures at the top were seen.

What is the common name and scientific name of the organism which grew on the moist slice of bread?
How did this organism grow on the moist slice of bread automatically?
What are the fine, thread-like projections on the surface of slice of bread known as?
What name is given to the knob-like structures and what do they contain?
What is the name of this method of reproduction?
Name one unicellular organism which reproduces by this method.
Name tow non-flowering plants which reproduce by this method.

Define evolution. How does it occur? Describe how fossils provide us evidences in support of evolution.

At which trophic level a person is feeding when he is eating:

Roasted chicken.
Bread.
Eggs.
Apple.
Fish.

Arrange the following elements in the increasing order of their metallic character Mg, Ca, K, Ge, Ga.

The speed of light in air is $3 \times 10^8 m / s$. In medium $X$ its speed is $2 \times 10^8 m / s$ and in medium $Y$ the speed of light is $2.5 \times 10^8 m / s$. Calculate:
a. air ${ }^n x$
b. air ${ }^n y$
c. $X^n y$

An object is placed at a distance of 10cm from a concave mirror of focal length 20cm.

Draw a ray diagram for the formation of image.
Calculate the image distance.
State two characteristics of the image formed.

How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?

When a mixture of gases $X$ and $Y$ is compressed to 300atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide (heated to a temperature of $300^{\circ} C$ ), then an organic compounds Z having the molecular formula $CH _4 O$ is formed. X is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; $Y$ is a gas which can be made by the action of a dilute acid on an active metal; and $Z$ is a liquid organic compound which can react with sodium metal to produce hydrogen gas:
a. What are $X , Y$ and Z ?
b. Write a balanced chemical equation of the reaction which takes place when $X$ and $Y$ combine to form $Z$. Indicate the conditions under which the reaction occurs.