Write the composition of moleten mixture which is electrolysed to extract aluminium
1 Answers
Talk Doctor Online in Bissoy App
A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of air. However, if ethyne is burnt with oxygen,...
1 Answers 1 views
Name the gases produced when water reacts with: (a) Aluminium nitride (b) Aluminium carbide.
(a) Ammonia gas is formed (b) Methane is formed
1 Answers 1 views
What is the mass of (a) 1 mole of nitrogen atoms? (b) 4 mole of aluminium atoms (Atomic mass of aluminium = 27)?
(a) The mass of 1 mole of nitrogen atoms is 14g. (b) The mass of 4 moles of aluminium atoms is (4 × 27)g = 108g (c) The mass of 10 moles...
1 Answers 1 views
Calculate the number of aluminium ions present in 0.051g of aluminium oxide. (Hint: The mass of an ion is the same
1 mole of aluminium oxide (Al2O3) = 2 × 27 + 3 × 16 = 102g i.e., 102g of Al2O3 = 6.022 × 1023 molecules of Al2O3 Then, 0.051 g of Al2O3...
1 Answers 1 views
How does the pH of Al-NaCl solution be affected when it is electrolysed ?
When Al-NaCl solution is electrolysed, H2 is liberated at cathode, Cl2 at anode and NaOH is formed in the solution. Hence pH of solution increases.
1 Answers 1 views
A mixture of iron nails, salt, oil and water is provided to you. Give stepwise methods to separate each component from this mixture?
(a) Iron nails - hand picking / magnet (b) Oil - decantation (c) Salt, Water - evaporation and condensation
1 Answers 1 views
Read the extract given below and answer the questions that follow. Write the answer in your answer sheet in one or two lines only.
(i) The frog (ii) The Nightingale (iii) The speaker refers it as poor because she is dead (iv) She died when the veins of her neck bursted.
1 Answers 2 views
Read the extract given below and answer the questions that follow. Write the answer in your answer sheet in one or two lines only?
(i) Calpurnia is the speaker of the above lines. (ii) Calpurnia saw bad omens in her dream regarding Caesar. So, she is worried for him. (iii) Calpurnia is afraid for Caesar’s life...
1 Answers 1 views
Which of the following is the life saving mixture for an asthma patient ? (a) Mixture of helium and oxygen
(a) Mixture of (He + O2 ) is used for asthma patient
1 Answers 1 views
How long (approximate) should water be electrolysed by passing through 100 amperes current
It's because n-factor in 2H2O is "4" 2H2O→O2+4H + 4e Since the n factor if 4 We took 4 there... I hope u have understood the answer
1 Answers 1 views