The company decided to ___ the new product due to poor sales.
a) bring up
b) call off
c) look into
d) carry on


She had to ___ a lot of difficulties to achieve her goals.
a) put up with
b) look down on
c) get through
d) take after

👍Mathematics

1. What is the atomic number of carbon?
   a) 6 
   b) 12 
   c) 14 
   d) 8 

2. Which of the following is a noble gas?
   a) Oxygen 
   b) Nitrogen 
   c) Argon 
   d) Hydrogen 

3. What is the chemical formula for water?
   a) H2O2 
   b) HO 
   c) H2O 
   d) O2H 

4. Which of the following elements is a halogen?
   a) Helium 
   b) Fluorine 
   c) Neon 
   d) Argon 

5. What is the pH of a neutral solution at 25°C?
   a) 0 
   b) 7 
   c) 14 
   d) 1 

6. Which type of bond involves the sharing of electron pairs between atoms?
   a) Ionic bond 
   b) Metallic bond 
   c) Covalent bond 
   d) Hydrogen bond 

7. What is the main component of natural gas?
   a) Ethanol 
   b) Propane 
   c) Methane 
   d) Butane 

8. Which of the following is an example of an exothermic reaction?
   a) Photosynthesis 
   b) Melting ice 
   c) Combustion of fuels 
   d) Dissolving salt in water 

9. What is the molar mass of water (H2O)?
   a) 16 g/mol 
   b) 18 g/mol 
   c) 20 g/mol 
   d) 22 g/mol 

10. Which law states that the total pressure of a gas mixture is equal to the sum of the partial pressures of its components?
    a) Boyle's Law 
    b) Charles's Law 
    c) Dalton's Law 
    d) Avogadro's Law 

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