Advertisements
Advertisements
प्रश्न
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
Salt of silver, such as ________ is used for making photographic films.
उत्तर
Salt of silver, such as silver chloride is used for making photographic films.
APPEARS IN
संबंधित प्रश्न
State one use of Copper.
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
Give reasons
Magnesium is used in fire works.
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
Name a metal which is not malleable :
Write scientific reason.
Anodes need to be replaced from time to time during the electrolysis of alumina.
When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
Give reasons for the following:
Most metals conduct electricity well.
What is it made from? Why?
Electric cables
State why telegraph poles are painted with aluminium paint.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
The minerals from which the metal can be separated economically are called _______.
Complete the following flow chart.
Why are bells made of metals?
A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
