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The acid present in soft drinks is ? |
A) Carbonic acid B) Tartaric acid C) Malic acid D) Salicylic acid Correct Answer : Carbonic acid Explanation : The three most common acids in soft drinks are citric, carbonic and phosphoric acids. Citric acid(C6H8O7)preserves food and enhances flavor. It is one of the most useful ingredients in the food and beverage industries. Carbonic acid(H2C03) is used to get the fizz, sour and sparkling taste. Phosphoric acid(H3PO4) add a tangy flavor and prevents the growth of mold and bacteria. |
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What is the formula of Glucose? |
C6H22O11 Correct Answer :C6H12O6 |
What is the bond order CO group? |
A) 1 B) 2.5 C) 3.5 D) 3 Correct Answer : 3 Explanation : In CO, there is a triple bond between C and O. |
Rate constant depends on? / दर स्थिरांक निर्भर रहता है? |
Temperature/ ताप
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The formation of starch in plants results from? / पादपों में स्टार्च का बनना _______ परिणाम है? |
Photosynthesis/प्रकाश संश्लेषण
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Ligands are:/ लिगेंड होते हैं: |
Lewis acids/ लूईस अम्ल
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The chemical reactions in which reactants require high amount of activation energy are generally? / रासायनिक अभिक्रियाऐं जिनमें क्रियाकारकों को उच्च सक्रियण ऊर्जा की आवश्यकता होती है ये अभिक्रियाऐं सामान्यतः होती है? |
Slow / धीमी
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Which of the following is not a polymer?/ निम्न में से कौनसा बहुलक नहीं है? |
Wool/ऊन
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Among the following a natural polymer is? |
A) Cellulose B) Poly Vinyl Chloride C) Teflon D) Polyethylene Correct Answer : Cellulose Explanation : Cellulose, another natural polymer, is the main structural component of plants. |
How many symmetry elements (planes, axis and center) are there in a crystal?/ कितने सममिति तत्व (समतल, अक्ष और क्रेन्द) क्रिस्टल ठोस में होते हैं? |
3
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The entropy of a system in an irreversible process is? / एक अनुत्क्रमणीय प्रक्रिया में तंत्र की एनट्राँपी? |
Increased/ बढ़ता है
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The value of electrode potential depends upon?/इलैक्ट्रोड विभव का मान किस पर निर्भर करता है? |
Nature of metal/ धातु की प्रकृति
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In photochemical reactions the energy absorb by one mole of the substance is called? / प्रकाश रासायनिक प्रक्रियाओं में, पदार्थ के एक मोल द्वारा अवशोषित ऊर्जा को कहा जाता है? |
One quantum/ एक क्वांटम
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Which has highest value of boiling point?/ किसका क्वथनांक बिंदु उच्चतम है? |
CH4
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Silver chloride when dissolved in ammounium hydroxide forms?/ एमोनियम हाइड्रॉक्साइड में सिल्वर क्लोराइड घोले जाने पर बनाता है: |
Ag(OH). |
Which of the following is not an amino acid?/ इनमें से कौन एक एमिनो एसिड नहीं है? |
Glycine/ ग्लिसरिन
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Example of condensation polymer is? |
A) Polyethene B) PVC C) Orlon D) Terylene Correct Answer : Terylene Explanation : Condensation polymers are any kind of polymers formed through a condensation reaction—where molecules join together—losing small molecules as byproducts such as water or methanol. Terylene is a condensation polymer. The class of polyesters are formed by esterification reaction of a di-carboxylic acid with a diol. This reaction is called a condensation reaction because 2 molecules of water (H2O) are eliminated for every molecule of terephthalic acid that reacts with the diol. |