Choose the correct option:
1) Which of following symbols is not derived from the Latin name of element?.
a) Fe b) Cu c) Cr d) Pb
2) What is a valency of magnesium in Mg3N2
a) 1 b) 2 c) 3 d) 4
3) What is value of y in the following equation.
CaCO3 + y HCl-----CaCl2+ H2O + CO2
a) 1 b) 2 c) 3 d) 4
4) In which of following reactions light be absorbed?
a) photosynthesis b) respiration c) burning of sulphur d) burning of magnesium
5)The reaction Mg +H2O ____Mgo + H2 is a_____ Reaction.
a) Displacement b) Combination c) Neutralisation. d) None of these
please answer me fast it's urgent
the first one and who's answers will be correct will be BRAINLIEST
Answers
Answer:
1.d. 4.a. 5.a.
Explanation:
5. Photosynthesis is a process where light energy is absorbed by plants through chloroplast and get converted into starch.Whereas in C and D options the light energy is liberated in the form of heat.And respiration doesn't require light unless it's photorespiration.
Answer:
1. d. Pb
2. b. two
3. b. 2
4. a. Photosynthesis
5. b. combination reaction
Explanation:
1. The symbol of Pb is not taken from Latin names.
2. In Mg3N2, the three molecules of magnesium react with two nitrogen and result in the formation of magnesium nitride. Hence, the valency of magnesium is two .
4. Photosynthesis process absorb light by chlorophyll .
5. Type of Chemical Reaction: For this reaction we have a combination reaction. Balancing Strategies: In this combination reaction the MgO and H2O come together to from Magnesium hydroxide. That's way it's called a combination reaction. Be sure to count all of the oxygen atoms on the reactant (left) side of the equation.