Which of the following is not a double-replacement?
1 answer:
Answer:
The correct answer is option D.
Explanation:
From the given options the reaction which is not a double replacement reaction is:

This because the above reaction is an example of single replacement reaction.

Whereas;
Double replacement reaction is a type of chemical reaction in which exchange of ions among the reactants take place.

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Answer:
applying 1st eq of motion vf=vi+at we have to find a=vf-vi/t here a=50-30/2=10 so we got a=10m/s²
Answer:
a.
b.
Explanation:
We are given that




a.We have to find the angle


b. We have to find the speed 
According to law of conservation of momentum



It has zero kinetic energy, more potential energy
I think its all four of them could be wrong but try all four !!!!!!