Chemistry Oxygen has (+) oxidation number only in OF2 H2O (2) N2O C12O OF2 H2O (2) N2O C12O ANSWER DOWNLOAD EXAMIANS APP
Chemistry A balloon filled with helium rises in air because The balloon is weightless Helium pushes down on the air below the balloon Air exerts an upward force on the balloon Helium is less dense than air The balloon is weightless Helium pushes down on the air below the balloon Air exerts an upward force on the balloon Helium is less dense than air ANSWER DOWNLOAD EXAMIANS APP
Chemistry Galena is a mineral of Lead Calcium Iron Gold Lead Calcium Iron Gold ANSWER DOWNLOAD EXAMIANS APP
Chemistry The element with highest first ionisation energy is Sodium Helium Lithium Hydrogen Sodium Helium Lithium Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not present in RNA Phosphate Uracil Thymine Ribose Phosphate Uracil Thymine Ribose ANSWER DOWNLOAD EXAMIANS APP
Chemistry Acid rain is caused due to pollution of atmosphere by None of these Oxides of carbon and nitrogen Oxides of nitrogen and sulphur Oxides of nitrogen and phosphorous None of these Oxides of carbon and nitrogen Oxides of nitrogen and sulphur Oxides of nitrogen and phosphorous ANSWER DOWNLOAD EXAMIANS APP
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