True/false
the alloy invar contains iron and aluminium.

True/false Tamarind contains oxalic acid.

Write the balanced chemical equations fo rthe following reactions and identify the type of reaction in each case. Thermit reaction, iron oxide reacts with aluminium and gives molten iron and aluminium oxide.

State whether the statement is true or false- Bell metal is made of copper and aluminium.

Why are pickles, chutney and citrus fruits not stored in iron and aluminium utensils?

You are provided with a container made up of aluminium. You are also provided with solutions of dil HCl, dil HNO_3 , ZnCl_2 and H_2O . Out of these solutions which solution, can be kept in the aluminium container? Name the type of reactions takes place.

True or false dish washing powder contains an enzyme amylase.

Give an appropriate answer of the statement- An alloy is made up of iron, aluminium, nickle and cobalt. What is the name and uses of that alloy?

What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.

Explain the following statement-An alloy made up of copper and aluminium used for making artificial jewellery and religious idols.